Paul kgyy wrote:

Order one of each from somebody that will permit 30-day returns
without a restocking fee.

Fly 2 hours out with brand A, back with B.
Then fly 2 hours our with B, return with A.

Excellent suggestion.

Replacement isn't a
big deal but sometimes in IMC things get really busy.

Of course, some headsets provide quite a warning that the batteries are
in need of replacement. maybe as long as 10 hours.